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LM2853MH-1.2
Texas Instruments
IC REG BUCK 1.2V 3A 14HTSSOP
1567 Pcs New Original In Stock
Buck Switching Regulator IC Positive Fixed 1.2V 1 Output 3A 14-PowerTSSOP (0.173", 4.40mm Width)
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5.0 / 5.0
- (448 Ratings)
LM2853MH-1.2
Product Overview
1341843
DiGi Electronics Part Number
LM2853MH-1.2-DGManufacturer
Texas Instruments
LM2853MH-1.2
Description
IC REG BUCK 1.2V 3A 14HTSSOPInventory
1567 Pcs New Original In Stock
Buck Switching Regulator IC Positive Fixed 1.2V 1 Output 3A 14-PowerTSSOP (0.173", 4.40mm Width)
Quantity
Minimum 1
Minimum 1
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LM2853MH-1.2 Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
-
Series
SIMPLE SWITCHER®
Product Status
Obsolete
Function
Step-Down
Output Configuration
Positive
Topology
Buck
Output Type
Fixed
Number of Outputs
1
Voltage - Input (Min)
3V
Voltage - Input (Max)
5.5V
Voltage - Output (Min/Fixed)
1.2V
Voltage - Output (Max)
-
Current - Output
3A
Frequency - Switching
550kHz
Synchronous Rectifier
Yes
Operating Temperature
-40°C ~ 125°C (TJ)
Mounting Type
Surface Mount
Package / Case
14-PowerTSSOP (0.173", 4.40mm Width)
Supplier Device Package
14-HTSSOP
Base Product Number
LM2853
Datasheet & Documents
HTML Datasheet
LM2853MH-1.2-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Standard Package
94
Alternative Parts
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MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
고객 지원팀이 실시간으로 응대해 줘서 문제없이 구매할 수 있었습니다.
de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
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Frequently Asked Questions (FAQ)
Can I use the LM2853MH-1.2 in a 5V-to-1.2V design where input voltage may briefly dip below 3V during startup or load transients, and what are the risks?
The LM2853MH-1.2 has a minimum input voltage of 3V, and operating below this threshold—even briefly—can cause the internal control loop to become unstable, leading to output voltage overshoot or failure to regulate. In designs where input droop below 3V is possible (e.g., during battery startup or high inrush current events), consider adding input bulk capacitance or a soft-start circuit. Alternatively, evaluate a wider-input-range buck regulator like the TPS54332 (3V–28V input) to avoid marginal operation and ensure reliable startup under all conditions.
Is the LM2853MH-1.2 a suitable drop-in replacement for the LM2852MH-1.2 in a 3A, 1.2V output application, and what layout or thermal considerations should I re-evaluate?
While the LM2853MH-1.2 and LM2852MH-1.2 share the same package and similar functionality, the LM2853MH-1.2 supports up to 3A output versus 2A for the LM2852MH-1.2. However, at 3A, power dissipation increases significantly—especially at higher input voltages (e.g., 5V to 1.2V results in ~1.14W loss). You must verify PCB thermal performance: ensure adequate copper pour on the PowerPAD™, use thermal vias, and possibly increase airflow. Also, confirm that your inductor can handle 3A saturation current; a marginal 2A-rated inductor will overheat or saturate, causing efficiency drop and potential failure.
The LM2853MH-1.2 is listed as obsolete—what are the most reliable and electrically compatible alternatives from Texas Instruments, and do they require design changes?
Since the LM2853MH-1.2 is obsolete, TI recommends migrating to the LM2853MH-1.2/NOPB (RoHS-compliant version) if available, but long-term, consider the TPS62130ARGTR (3A, 3V–17V input, 1.2V fixed output, QFN-16). It offers higher efficiency, wider input range, and better thermal performance. While pin-compatible in function, the TPS62130 uses a different control scheme (D-CAP2™ vs. current-mode), so feedback compensation and layout may need adjustment. Always re-validate stability with your actual load and input conditions before full production transition.
How does the 550kHz switching frequency of the LM2853MH-1.2 impact EMI and component selection in a noise-sensitive analog system, and can I reduce interference without changing the IC?
The 550kHz fixed frequency of the LM2853MH-1.2 can generate harmonics that interfere with sensitive analog circuits (e.g., ADCs, sensors), especially if not properly filtered. To mitigate EMI, use a shielded inductor, place input/output capacitors close to the IC, and implement a Pi-filter at the output. Additionally, avoid routing sensitive traces under the regulator. If conducted emissions exceed limits, consider adding a common-mode choke or selecting a regulator with frequency synchronization or spread-spectrum capability, such as the TPS563200, though this would require a full redesign.
Can I parallel two LM2853MH-1.2 devices to achieve 6A output current, and what are the critical risks in doing so without current-sharing control?
Paralleling two LM2853MH-1.2 regulators without active current-sharing circuitry is not recommended and poses significant reliability risks. Due to minor variations in output voltage setpoints and feedback thresholds, one device may carry significantly more current than the other, leading to thermal runaway and premature failure. The LM2853MH-1.2 lacks external synchronization or current-share pins, making balanced load sharing nearly impossible. For 6A applications, use a single higher-current solution like the TPS54620 (6A, synchronous buck) or implement a master-slave configuration with external current monitoring and balancing—though this adds complexity and cost.
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LM2853MH-1.2 CAD Models
Texas Instruments LM2853MH-1.2 PCB symbols & footprints
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